Add yq key checking for abra.yml

abra

@@ -1,11 +1,38 @@
 #!/bin/bash
+
 PROGRAM_NAME=$(basename "$0")
+ABRA_CONFIG=abra.yml
+
+yml_pattern_exists() {
+	PATTERN=$1
+
+	if ! type yq > /dev/null 2>&1; then
+		echo "$(tput setaf 1)ERROR: yq program is not installed$(tput sgr0)"
+		exit
+	fi
+
+	if [ -f $ABRA_CONFIG ]; then
+			RESULT=$(yq read $ABRA_CONFIG "$PATTERN")
+
+			if [ "$RESULT" != 0 ]; then
+				return 0
+			fi
+	fi
+
+	return 1
+}
 
 if [ "$1" == "-a" ]; then
 	STACK_NAME=$2
 	shift 2
 fi
 
+if [ -f abra.yml ]; then
+	if yml_pattern_exists stack_name; then
+		STACK_NAME=$(yq read abra.yml stack_name)
+	fi
+fi
+
 if [ -z "$STACK_NAME" ]; then
 	echo "$(tput setaf 1)ERROR: \$STACK_NAME must be set (e.g. export STACK_NAME=my_cool_app)$(tput sgr0 )"
 	exit